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f-alpha.net » Electronics » Integrated Circuits » Comparator » Let's go... » Experiment 7 - Feedback

Experiment 7 - Feedback

Into the comparator circuit you have now inserted the resistor R3. It connects the output of the comparator to its input.

Circuit diagram comparator with feedback.

Circuit comparator with feedback. (Enlarge)

By turning the potentiometer P1 and thereby increasing the input voltage Vin, you need to turn much further until the comparator switches from LOW to HIGH.

Lowering the input voltage again, you again have to turn much further back until the comparator switches back to LOW...

Signal profile non-inverting comparator with feedback.

Schmitt Trigger

A comparator circuit with feedback is also known as a Schmitt trigger circuit.

Through the resistance of R3 you adjust the width of the hysteresis...

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